A vet assessment is the best bet to figure out if it was a temporary “Ow, I need a minute” or if there is a sprain that needs to be monitored… or if there is a fracture/break. At the vet appointment, your vet should be able to narrow down the possibilities and you may need to do an X-ray if it is not clear.
I will share a recent experience where my rabbit Wick actually took a fall and was holding his left paw up. The vet said that she believed if was likely just a sprain/muscle-injury, but she couldn’t know exactly. We opted for the X-ray, and we were very glad to do that because he ended up having a complete fracture of a finger (he broke his middle finger), and that heavily changed what his treatment would be as a result.
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.